title: High sensitivity UV fluorescence spectroscopy based on an optofluidic jet waveguide.
abstract: A novel spectroscopic sensor based on an optofluidic liquid jet waveguide is presented. In this device, a liquid jet waveguide is generated with the solution under analysis. This stream, exploiting total internal reflection, acts as an optical waveguide confining the autofluorescence light produced by chemical or biological samples when opportunely excited. Using a self-aligned configuration, the liquid jet is directly coupled with a multimode optical fiber collecting the fluorescence towards the detection system. Experimental measurements have been performed using an UV excitation source on water solutions containing representative water pollutants as aromatic hydrocarbons or bacteria showing very low limit of detection.
authors.forename: Gianluca
authors.initials: G
authors.lastname: Persichetti
authors.forename: Genni
authors.initials: G
authors.lastname: Testa
authors.forename: Genni
authors.initials: G
authors.lastname: Gesta
authors.forename: Romeo
authors.initials: R
authors.lastname: Bernini
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D002138:Calibration; D057230:Limit of Detection; D009281:Naphthalenes / Q000032:analysis; D055095:Optics and Photonics / Q000379:methods*; D012996:Solutions; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D014050:Toluene / Q000032:analysis; D014867:Water / Q000737:chemistry
chemical_list: D009281:Naphthalenes; D012996:Solutions; D014867:Water; C031721:naphthalene; D014050:Toluene